Medical helium/oxygen mixtures in intensive care
Considerably less dense than air, helium/oxygen gas mixtures have been used in the medical setting for many years.

Most clinicians will have encountered patients with airway obstruction where conventional treatment regimes have been inadequate, resulting in serious patient discomfort.

Breathing helium/oxygen mixtures can lead to a reduction in resistance to flow within the airways, and consequently to a decrease in the work of breathing, particularly in disorders that are characterized by increased airway resistance.

Medical helium/oxygen mixtures augment, rather than replace, other treatments. Helium/oxygen mixtures do not directly treat the cause of a respiratory condition, but can help relieve symptoms by improving gas exchange in the alveoli, buying time for conventional clinical treatments to take effect.

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